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07 November 1975
Vol 190, Issue 4214

About The Cover

Dark-field photomicrograph of an autoradiograph showing a vertical band of cortico-cortical fiber terminals in layers II, III, and IV of the cerebral cortex of a monkey. The fibers are labeled by axoplasmic transport of radioactive proteins from an injection site in another part of the cerebral cortex (X 120). See page 572. [E. G. Jones et al., Washington University School of Medicine, St. Louis, Missouri]